Term
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Definition
| force exerted on load or subject to be moved |
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Term
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Definition
| no shortening; muscle tension increases but does not exceed load; cross bridges generate force but do not move actin filaments |
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Term
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Definition
| muscle changes in length and moves load; thin filaments slide |
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Term
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Definition
| motor neuron and all muscle fibers it supplies |
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Term
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Definition
| motor unit's response to single action potential of it;s motor neuron |
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Term
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Definition
| events of excitation-contraction coupling; no muscle tension |
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Term
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Definition
| cross bridge formation; tension increases |
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Term
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Definition
| calcium re-enters the sarcoplasmic reticulum; tension declines to zero |
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Term
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Definition
| varying strength of contraction for different demands |
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Term
| wave (temporal) summation |
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Definition
| increased stimulus frequency (muscle does not completely relax between stimuli); second contraction is of greater force |
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Term
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Definition
| no relaxation between stimuli; results in muscle fatigue |
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Term
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Definition
| a response to change in stimulus strength where there is multiple motor unit summation to control force of contraction |
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Term
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Definition
| a response to change in stimulus strength where there is not observable contraction |
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Term
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Definition
| a response to change in stimulus strength where the stimulus strength causes first observable muscle contraction |
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Term
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Definition
| a response to change in stimulus strength to the point of strongest stimulus that increases contractile force |
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Term
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Definition
| the way in which recruitment works; motor units with smallest muscle fibers recruited first |
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Term
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Definition
| muscle shortens and does work |
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Term
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Definition
| muscle generates force as it lengthens |
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Term
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Definition
| constant, slightly contracted state of all muscles due to spinal reflexes to keep muscles ready to respond |
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Term
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Definition
| only uses glycolysis, produces latic acid; yields less ATP but much faster |
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Term
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Definition
| produces most of ATP during rest and light to moderate exercise |
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Term
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Definition
| physiological inability to contract despite continued stimulation |
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Term
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Definition
| muscle fiber type that uses aerobic pathways |
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Term
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Definition
| muscle fiber type that uses anaerobic glycolysis |
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